What is the difference between getSharedSecret and ECDH_compute_key about noble-curves

[paulmillr]

I have no idea. noble multiplies point B by secret scalar A, which is the general definition of shared secret / ecdh. It must always be the same between all implementations.

Ensure the output is compressed / uncompressed depending on your needs.

noble-curves/src/abstract/weierstrass.ts

Lines 921 to 926 in a1a7dc9

	function getSharedSecret(privateA: PrivKey, publicB: Hex, isCompressed = true): Uint8Array {
	if (isProbPub(privateA)) throw new Error('first arg must be private key');
	if (!isProbPub(publicB)) throw new Error('second arg must be public key');
	const b = Point.fromHex(publicB); // check for being on-curve
	return b.multiply(normPrivateKeyToScalar(privateA)).toRawBytes(isCompressed);
	}